wxCover is a free and cross-platform cover printing application. With it, you can print CD/DVD/anything-you-want covers with perfect dimensions.

It's released under the GNU GPL licence and it is available in english, spanish and french.

Most common image formats are supported (bmp, gif, jpg, png and tif).

It's written in C++, using wxWidgets. This means that it's cross-platform. It has currently been tested on Linux and Win32, and it should work on MacOSX (not tested yet).